sfsuphysics
Supporting Member
Well I think reagents simply add to the complexity of the system. In the same way doing a pH test with reagents is more complicated than simply putting a probe into the water. While yeah the underlying technology is more simple, for the end user it's more work.
So you have a reagent based auto tester you need, to get the reagent to a test cup, involves a pump of some sort, a syringe for accuracy and as you found out replacement of parts as they can gunk up, some way to accurate mix tank water with reagents, a way to optically distinguish when said reagents change colors (or what the color represents), then a way to clean your container to remove it of all residue (I'm guessing this is done with RO/DI water?
Now I'm not going to pretend I know how the probes work, and they very well might work differently than I think, but cup to hold tank water, put probe in, read voltage and translate that to a value, rinse out cup.
So you have a reagent based auto tester you need, to get the reagent to a test cup, involves a pump of some sort, a syringe for accuracy and as you found out replacement of parts as they can gunk up, some way to accurate mix tank water with reagents, a way to optically distinguish when said reagents change colors (or what the color represents), then a way to clean your container to remove it of all residue (I'm guessing this is done with RO/DI water?
Now I'm not going to pretend I know how the probes work, and they very well might work differently than I think, but cup to hold tank water, put probe in, read voltage and translate that to a value, rinse out cup.